Wrench.



C. G. & C. F. YOUNGQUIST.

WRENCH.

APPLICATION FILED Nov. 11, 1910.

1,008,403. Patented Nov. 14, 1911. A

'narran sramns ramena* onirica.

CARL Gr. YOUNGQUIST AND CARL F. YOUNGQUIST, OF SAN FRANCISCO, CALIFORNIA.

WRENCH.

Loosaos.

Specification of Letters Patent.

Patented Nov. 14k, 1911.

To all whom fit 'may concern:

Be it known that we, CARL G. YOUNG- QUisr and CARL F. YoUNGQUisT, citizens of the United States, and residents of San Francisco, in the county of San Francisco and State of California, have invented a new and lmproved Vrench, of which the following is a full, clear, and exact description.

Our invention relates to wrenches, and it has for its object to provide one having an eccentric journaled to a movable jaw, with a worm mounted to rotate on the eccentric, so that by rotating the eccentric the worm may be moved into or out of engagement with the rack teeth on the shank of the wrench.

Additional objects of the invention are to provide the shank of the eccentric with a milled head by which the shank may be readily rotated, a boss being mounted on a bearing member for traveling in a curved groove in the head, so that the rotary movement of the head will be limited; and to provide a spring for turning the shank of the eccentric so that the worm will normally engage the rack teeth.

Additional objects of the invention will be disclosed in the following specification in which the preferred form of our invention is disclosed.

In the drawings similar characters of reference refer to similar parts in all the views in which- Figure 1 is a side elevation partially in section showing our improved wrench; Fig. 2 is a sectional view on the line 2 2 of Fig. 1; Fig. 3 is an elevation showing the bearing against which the head is disposed; and Fig. 4L is an elevation showing the head.

By referring to the drawings it will be seen that a shank 5 is provided having rack teeth 6, and a jaw 7. This shank 5 is provided with a spindle 8, which is inserted in an opening 9 in the handle 10, the end of the spindle 8 being threaded and projecting from the handle 10, a nut 11 being provided for engaging the threaded portion of the spindle 8, for securing the shank 5 to the said handle 10. A movable jaw 12 is provided with t-he usual members 13, having an opening 14, in which the shank is disposed.

Secured to a member 15, integral with the movable jaw 12, there is a bearing member 16, there being a second bearing 17, spaced from the said bearing member 16.

In this bearing member 16 and bearing 17, are disposed the shanks 18 and 19 secured to the eccentric 20, a worm 21 being mounted to rotate on the eccentric 20, and being adapted to engage the rack teeth 6. A spring 22 is coiled around the shank 18, one of the terminals of this spring 22 being secured to the eccentric 21, the other terminal being secured to the bearing member 16. The function of the spring 22 is to rotate the shanks 18 and 19 of the eccentric 20, so that the worm will normally engage the rack teeth. The shank 18 projects outwardly beyond the bearing member 16, and secured to it there is a milled head 23, this milled head 23 having a curved groove 24, in which a boss 26 secured to the bearing member 16 is disposed. By this means the rotary movement of the head 23 is limited.

In using the invention the eccentric 20 is normally so disposed that the worm 21 will engage the rack teeth 6. Vhen it is desired to move the movable j aw 12 quickly a considerable distance along the shank 5, the head 23 is rotated relatively to the bearing member 16, carrying with it the shanks 18 and 19, and the eccentric 20. This will move the worm 21 out of engagement with the rack teeth 6, permitting the movement of the movable jaw 12 along the shank 5, without t-he necessity of turning the worm 21. When the mechanic frees the head 23 the spring will rotate the shank 18 and the eccentric 2O so that the worm 21 will again engage the rack teeth. The rotary movement of the shanks 18 and 19, the eccentric 20 and the head 23 will be limited by the boss 26, which travels in the groove 24.

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

1. In a wrench, a shank having rack teeth and a jaw, a second jaw having bearings mounted to move on the shank, two shanks journaled in the bearings and being adapted to rotate and to move longitudinally relatively thereto, an eccentric secured to the shanks, a worm mounted on the eccentric normally meshing with the rack teeth, a. spring wound around one of the shanks with one terminal secured to the eccentric, and the other terminal secured to one of the bearings, the spring being adapted to rotate the eccentric, and to move the eccentric longitudinally relatively to the rack teeth on the first-mentioned shank, a stud secured to one of the bearings, and a head Secured to one of the Shanks and having a stop adapted to engage the stud.

2. In a Wrench a Shank having rack teeth and a jaw, a Second jaw having` a sleeve and a bearing mounted to move on the Shank, a bearing member having a Stud and secured in the sleeve against rotation, tWo Shanks journaled in the bearings respectively, an eccentric secured to the Shanks, a Worm mounted on the eccentric normally meshing with the rack teeth, a Spring Wound around one of the Shanks With one terminal secured to the eccentric, and the other terminal secured to the hearing member, and 15 names to this specification in the presence 20 of tWo subscribing Witnesses.

CARL G. YOUNGQUIST. CARL F. YOUNGQUIST. VitneSses:

D. A. TUFTS, SOPHIA M. SGHOMACKER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

